Sock accessory



FIG. 1 is a side elevational view of a first embodiment thereof, both sides being of the same appearance;

FIG. 2 is a top plan view of the first embodiment thereof;

FIG. 3 is a side elevational view of a second embodiment thereof, both sides being of the same appearance; and,

FIG. 4 is a top plan view of the second embodiment thereof.

The broken line showing of the sock in FIGS. 1 and 3 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a sock accessory, as shown and described. 